Sunday
April 20, 2014

Posts by SARA


Total # Posts: 3,531

econ
Market demand facing a monopolist is Qd=-5P+20. If the monopoly practices perfect price discrimination, what is the profit-maximizing level of output when MC=$2?

Calculus-concavity and graphing
(2x+1)/(8x+1) f is increasing for x: f is decreasing for x: find local max/min:

Calculus-Applied Optimization Problem:
Find the point on the line 6x + 3y-3 =0 which is closest to the point (3,1). Note: Your answer should be a point in the xy-plane, and as such will be of the form (x-coordinate,y-coordinate)

chemistry
calculate the molar mass of a liquid if .955grams of its vapors occupy 2.50Liters at 200 Celsius and 45 torr

Calculus Homework
Find the largest region over which the function f is increasing or decreasing, for: f(x):(x-4)/(x+8) f is increasing for x=

Calculus-Mean Value Theorem
Find the function G(x) whose graph passes through (pi/38,-12)and has f(x) as its derivative: G(x)= I already found which is: F(x)=76(1/-19)cos(19x)+C

Practice Exam Calculus
f(x) = 6sqrt{x}- 9x n the interval [1,9]. f(c)=f(9)-f(1)/9-(1)=? Verify that the conclusion of the Mean Value Theorem holds by computing Now find,c in (1, 9) so that f'(c) equals the answer you just found. c=?

physics
1.what is the final velocity of a hoop that rolls with out slipping down a 3.00m high hill starting at rest? 2. a 1.80 m radius playground merry go round (disk = 1/2 m r^2) hass a mass of 120 kg and is rotating with an angular velocity of .600 rev/s. what is the angular veloci...

chem 1211
P2 +3H2=2ph3 How many grams of ph3 can be formed when 37.5 grams of p2 and 83 L of h2 gas are reacted at 1 atm and 273.25 K? I really need a step by step of this problem. Thanks in advance!

Chemistry
Choose from the list the correct electron configurations for the following ions. A B C D E F G H I J K+ A B C D E F G H I J In+ A B C D E F G H I J Li+ A B C D E F G H I J Na+ A. 1s22s22p63s23p6 B. 1s22s22p63s23p64s23d104p64d105s25p1 C. 1s22s22p63s23p63d104s2 D. 1s22s22p63s23p...

Physics-Help Please!
a 25gram bullet is fired upward through a .36kg block. the block goes up 17cm in the air and the bullet goes up 24m into the air. What is the initial velocity of the bullet?

physics
a .025kg bullet is fired upward through a .36kg block. the block goes .17meters and the bullet goes up 24 m in the air. what is the initial velocity of the bullet?

Chemistry
During your experiment, you are drive water from the hydrate M x X y ⋅zH 2 O . You subsequently determine that your hydrate has four molecules of waters associated with each formula unit. However, the bottle the hydrate came from indicated a formula with only six molecul...

Eng. Comp III
I'm not sure what I am supposed to do here I am to write a Bibliographic essay on my sources for my final research essay - what does this entail? I don't want you to do my homework for me,just give me a couple of examples please, Thank You, Sara

health HELP
4. Which of theses provides the most Vitamin A? Vitamin B, Vitamin C, Vitamin D, Vitamin E, Vitamin K? Cheeseburger French fries, 10 strips Oatmeal cookie Cup of apple juice Cup of chocolate milk

health HELP
Which of theses items provide the most zinc? Cheeseburger French fries, 10 strips Oatmeal cookie Cup of apple juice Cup of chocolate milk

math
write each addiction vertically. decide which new groups you will make. then add to see if you were correct. 256+1.273 A new ten? A new hundred? A new thousand?

music (Anyone)
who knows 2 same pieces of music but have different performers?

physics
A shopper in a supermarket pushes a loaded cart with a horizontal force of 12 N. The cart has a mass of 33 kg. (a) How far will it move in 7.0 s, starting from rest? (Ignore friction.) m (b) How far will it move in 7.0 s if the shopper places her 30 N child in the cart before ...

Math
5th grade parent can you please show me how to break down 4 4/5 does it end up being 24/5? the probleam is: 4/4/5 -1 7/8

math
Thank you Jai!

math
5th grade math parent. This will sound dumb but.... 5/7 1/2 and 3/14. The sum is 1 3/7 correct? The question reads MArshall surveyed his classmates and found 5/7 have a sister, 1/2 have a brother, and 3/14 do not have siblings. The question is: Why does it make sense for the s...

math
5th grade math parent. This will sound dumb but.... 5/7 1/2 and 3/14. The sum is 1 3/7 correct? The question reads MArshall surveyed his classmates and found 5/7 have a sister, 1/2 have a brother, and 3/14 do not have siblings. The question is: Why does it make sense for the s...

Physics
A car traveling at a constant speed of 33.4 m/s passes a trooper hidden behind a billboard. One second later the trooper starts the car with a constant acceleration of 3.28 m/s2 How long after the trooper starts the chase does he overtake the speeding car

Physics
A car traveling at a constant speed of 33.4 m/s passes a trooper hidden behind a billboard. One second later the trooper starts the car with a constant acceleration of 3.28 m/s2 How long after the trooper starts the chase does he overtake the speeding car

Physics
A car traveling at a constant speed of 33.4 m/s passes a trooper hidden behind a billboard. One second later the trooper starts the car with a constant acceleration of 3.28 m/s2 How long after the trooper starts the chase does he overtake the speeding car

Physics
A car traveling at a constant speed of 33.4 m/s passes a trooper hidden behind a billboard. One second later the trooper starts the car with a constant acceleration of 3.28 m/s2 How long after the trooper starts the chase does he overtake the speeding car

Physics
A car traveling at a constant speed of 33.4 m/s passes a trooper hidden behind a billboard. One second later the trooper starts the car with a constant acceleration of 3.28 m/s2 How long after the trooper starts the chase does he overtake the speeding car

Physics
A car traveling at a constant speed of 33.4 m/s passes a trooper hidden behind a billboard. One second later the trooper starts the car with a constant acceleration of 3.28 m/s2 How long after the trooper starts the chase does he overtake the speeding car

Physics
a car travels at 25m/s on a flat stretch of road. The driver must maintaint he pressure on the accelerator to keep the care moving at this speed. What is the net work done on the car over a distance of 250m?

Physics
a car travels at 25m/s on a flat stretch of road. The driver must maintaint he pressure on the accelerator to keep the care moving at this speed. What is the net work done on the car over a distance of 250m?

English
Thanks again for your help.

English
Okay...

English
What does stilted mean?

English
I think that "and" shouldn't be added after fish.

English
How would you evaluate this writing piece in terms of writing, grammar, style and content?

English
Thankyou so much Writeacher! Please let me know if you see any other spelling or grammar errors.

English
This sentence needs to be paraphrased: This environmental concern should be addressed through legislative (law) changes, and enforcement to the Species at Risk Act, and the Environmental Protection and Clean Water Acts. There is alot of "and" used here.

English
Was there any spelling or grammar mistakes in this writing piece?

English
I think "concern" is word that is also all over the place.

English
I'm done working on my first post. Let's work on this post please?

English
Alright, please check my other post to see my responses :)

English
Please track the errors by editing this passage of writing. This is an exercise for my English homework. I have made a couple of changes or editing to the writing piece already, but I am not sure if there are more editing that needs to be made. Also, please evaluate the writin...

English
Alright, thanks for your help!

English
I am not sure either. I haven't written this piece. It was an exercise for my homework assignment.

English
Thankyou Writeacher :) I don't know #4 either. Would this work?: Toxicity assessment of oil sands use process affected water for fish cell lines.

English
Thanks Anonymous! I need help with paraphrasing this sentence: Toxicity assessment of oil sands process-affected (process affected) water using fish cell lines.

English
- Yes, Take oil out of the sands is much more smoother. - AB means Alberta. - This phrase seems akward to me: Natives get sick from eating to (too) many fish from mercury and air pollution is another big problem.

English
I need help with editing these sentence structures shown below, which is used in this writing piece. For example, can we break it into two sentences. This way it would make or sense. 1). Natives get sick from eating to (too) many fish from mercury and air pollution is another ...

English
Please track the errors by editing this passage of writing. This is an exercise for my English homework. I have made a couple of changes or editing to the writing piece already, but I am not sure if there are more editing that needs to be made. Also, please evaluate the writin...

Chemistry
What volume of 0.01 M NaOH should be required to raise the pH of a litre of 25 mM H2SO4 to 4.0? I started out by attempting to find the initial pH of H2SO4 and determined I need 2.57 units of pH to raise it to 4. I know that somewhere I use the HH equation, but don't know ...

College Physics 1
A space probe has two engines. Each generates the same amount of force when fired, and the directions of these forces can be independently adjusted. When the engines are fired simultaneously and each applies its force in the same direction, the probe, starting from rest, takes...

pre calcalus
(x+4)^2/3=9

math
i didnt get how 16x^2 turned into 8x^2 16x^2 = 30x + 4 Solving for x, 8x^2 - 15x - 2 = 0

simple math
If a= 9990.9 and b= 9886.1. First, convert these to scientific notation. If only three significant digits are allowed in decimal portion (mantisa) of the scientific notation and chopping and not rounding is used, what is a-b?

Sociology
I need to break a folkway and write an essay on it - any ideas?

American Gov
What is the primary claim made by those who oppose hate crimes legislation?

Geography
thank you Ms.sue

Geography
thank you Ms.sue

Math
if Kenneth has 22 problems of math to do for homework and had already done 12 problems done he would have to subtract 22-12=10 and then multiply 22 divide12 =10

Math
if Kenneth has 22 problems of math to do for homework and had already done 12 problems done he would have to subtract 22-12=10 and then multiply 22 divide12 =10

physics
A car accelerates from 44 m/s to 52 m/s in 3.4 seconds. What distance is covered?

Maths
A ramp was built to move equipments into a shed. The ramp rises one foot. If the lower edge of the ramp is 8 feet from the base of the shed what is the approximate length in feet of the ramp Can someone please help me with this question

Sociology
Diane Kendall,9th edition, the question for assignment 1 is the review the top 10 values listed in textbook and decide which values are missing from the list and why were they not listed.

Pre Calculus 2
A ship regularly travels between two ports that are 350 miles apart. When traveling directly from A to B, the ship sails on a bearing of . However, to avoid a storm, one day the ship leaves A on a bearing of and travels for 6 hours at 17mph. When the bad weather has passed, it...

Calculus!!
Using the identity: L{f(t)/t}=integral F(p)dp (s -->infinity), find the integral of: sin(t)/t dt (0-->infinity)

Ehglish
How would you analyze an audience for the topic: Should regulations for home schools be changed?

Calculus HELP!
Use the fact that L{f'}=sF-f(0) to derive the formula for L{cosh at}

Chemistry
Okay, cool. So, the oxidation state of Co is 2+. Co2+ = [Ar]4s2 3d7 Metal cations get rid of the s orbital before the d, so can I say then the number of unpaired electrons is 7?

Chemistry
The complex [Co(ox)3]4- has a high-spin electron configuration. How many unpaired electrons are there in the complex? I know because it's a high-spin, it's tetrahydral shaped. But I don't know what (ox) is so, I'm stuck in finding the oxidation state of Co whic...

Calculus
Find the Laplace transform of: f(t)=t-2e^(3t)

Chemistry
CoCl2<->CO+Cl2 Keq=7.6*10^-4 M CoCl2 is introduced in a closed container until its concentration is .890 M. What will be the concentration of Cl2 once the reaction has reached equilibrium?

Chemistry
How many liters of Cl2 has at a pressure of .950 atm and a temperature of 298K will be collected from the reaction of 25 mL of a .100 M aqueous solution of KMnO4 and an excess of HCI? KMnO4+HCI->MnCl2+Cl2+H2)+KCl

Chemistry
An aqueous solutions is 18.7% by mass Na3PO4. What is the boiling point of this solution? The Kb for water is .512 C/m. Consider if the solute is an electrolyte or a nonelectrolyte.

Chemistry
When the following reaction took place at 23.8 and a pressure of 758 torr, 3.9 L of o2 were collected. What mass of KCIO3 decomposed? KCIO3->KCI+O2

Chemistry
A mixture containing 5 g of H2 and 10 g of o2 is allowed to react in a 15 L rigid container at a constant temperature of 25 C. H2+O2->H2O Once the reaction is complete, what will be the pressure of the excess gas inside the container?

Chemistry
A sample of oxygen is collected over water at 22 C and 762 torr. What is the partial pressure of the dry oxygen? The vapor pressure of water at 22C is 19.8 torr.

Chemistry
A gas mixture containing N2 and O2 was kept inside a 2 L container at a temperature of 23 C and a total pressure of 1 atm. The partial pressure of oxygen was .722 atm. How many grams of nitrogen were present in the gas mixture?

Chemistry
A sample of oxygen is collected over water at 22 C and 762 torr. What is the partial pressure of the dry oxygen? The vapor pressure of water at 22C is 19.8 torr

Chemistry
Calculate the percent yield for the reaction if 76.8 g of H2O reacted and 125 g of NO were produced. NO2+H2O->HNO3+NO

Chemistry
Calculate how much acetylene (C2H2) can be produced from 358 g of H20 and an excess of CaC2 if the perfect yield for this reaction is 94.5% CaC2+H2)-> C2H2+C2H2+CA(OH)2

Chemistry
Calculate the number of moles of excess reactant that will be left-over when .350 g if HCN react with .500 g of 02: HCN+O2->N2+CO2+H20

Solution Set
The Y-coordinate of the solution of the system {x+y=3 {-3x+2y=-19 the answer is -2 how? I've done everything to try to solve!

Calculus
Find the complete solution to the 2nd ODE: 2y''+3y'+y=t^(2)+3sin(t)

Solution Set
Find the solution of |x-2|>8 The answer is {1,4} how?

Chemistry
Identify the type of structural isomerism that exists in each of the following pairs of compounds. (a) [CoCl2(NH3)4]Cl·H2O and [CoCl(NH3)4(H2O)]Cl2 coordination isomerism geometrical isomerism hydrate isomerism ionization isomerism linkage isomerism optical isomerism (b...

Chemistry
Identify the type of structural isomerism that exists in each of the following pairs of compounds. (a) [CoCl2(NH3)4]Cl·H2O and [CoCl(NH3)4(H2O)]Cl2 coordination isomerism geometrical isomerism hydrate isomerism ionization isomerism linkage isomerism optical isomerism (b...

Chemistry
1. Write the formula for these compounds: a) sodium tris(oxalato)rhodium(III) b) sodium tetrachloroplatinate(II) c) triamminetrichloronickel(IV) sulfate For a) I put: Na3Rh(C2O4)3, however got an error message of this: "Your answer appears to be missing required square br...

Simplify Math
m^(3/4)/m^(5/4)m^-2 hopefully you understand the equation.

Linear Equation
A gas station sells regular gas for $2.20 per gallon and premium gas for $2.70 a gallon. At the end of a business day 220 gallons of gas were sold and receipts totaled $519. How many gallons of each type of gas were sold? I know its a linear equation. just cant find out how to...

Chemistry
A couple questions here: 1. How do you expect nitriding to change the properties of iron? a) Nitriding makes iron stronger. b) Nitriding makes iron weaker. c) Nitriding makes iron more electrically conductive. d) Nitriding makes iron less electrically conductive. 2. Calculate ...

business communication
would you please rephrase it? my boss has given me to rewrite it for international employees. i want it to have in simple english so that every body can understand

business communication
can you plz correct it Howdy comrades! Shouldn’t surprise anyone that we took a beating this year, given the insane pricing moves our knucklehead competitors have been making. I mean how those clowns can keep turning a profit is beyond me, what with steel costs still goin...

Calculus-HELP!!!
Find a general solution to the first – degree ordinary differential equation. If an initial condition is given, find the corresponding particular solution. Write solution explicitly if possible: dx/dt=sqrt(x+t+1)

Calculus-HELP PLZ !!!!
Find a general solution to the first – degree ODE. If an initial condition is given, find the corresponding particular solution. Write solution explicitly if possible. (9x^2+y-1)dx-(4y-x)dy=0, y(1)=0

Calculus
Find a general solution to each first – degree ODE. If an initial condition is given, find the corresponding particular solution. Write all solutions explicitly if possible. dr/dè = r^(2)/è

Calculus
Show that both functions y1=e^(-2x) and y2=xe^(-2x) are solutions to the differential equation y^''+4y^'+4y=0

Statistics
A company has developed a new type of light bulb, and wants to estimate its mean lifetime. A simple random sample of 12 bulbs had a sample mean lifetime of 692 hours with a sample standard deviation of 30 hours. It is reasonable to believe that the population is approximately ...

Chemistry
Dinitrogen pentoxide, N2O5, decomposes by first-order kinetics with a rate constant of 0.15 s-1 at 353 K. (a) What is the half-life (in seconds) for the decomposition of N2O5 at 353 K? (b) If [N2O5]0 = 0.0579 mol·L-1, what will be the concentration of N2O5 after 4.0 s? ...

Chemistry
a) 2A --> B + C b) 2A --> B + C c) 2A --> 3B + C

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